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asteria which does not project, but which is ornamented on its sides 
by round points disposed in the form of a flowret, and on its angles 
by single round points. These include another asteria, which par- 
takes, but in a less degree, of the ornaments of each of the preced- 
ing. It is encircled by a line which does not project, nor swell out, 
as in the first described, but it is ornamented with a flowret somewhat 
similar to, but not so large, as that which is to be seen on the asteriae 
which are next to it. 
The column, Fig. 57 , has a neat as well as a rich appearance, in con- 
sequence of being composed of asteriae, the angles in some of M'hich 
are more acute, and the intervening recesses greater than in others. 
In the column represented Fig. 58, a very neat form is observable ; 
the column is composed of similar asteriae, possessing considerable in- 
dentations on their sides, the column being characterized like the 
one Fig. 52, by foramina in the angular recesses of the column, in the 
line of articulation. 
The entrochus, Plate XVI. Fig. 10, has some resemblance to the 
one represented Plate XIII. Fig. 55. It is rendered interesting by 
the form and appearance of its superior part ; a depression being there 
formed on every one of its five sides, in which were deposited the first 
ossiculae of the vertebral processes which were there given off. 
